The Colorado River Compact
In the arid Southwest, water is of vital importance and the Colorado River is the principal carrier of this most precious resource. Seven states-and Mexico-receive water from the Colorado River. The seven states are divided into the Upper and Lower Colorado River Basin with the mid-point at Lees Ferry, Arizona, approximately 15 miles (24km) below Glen Canyon Dam.
The Upper Basin includes the states of Wyoming, Utah, Colorado, and New Mexico. The Lower Basin includes Arizona, Nevada, and California. In 1922, these seven states reached an agreement to divide the waters of the Colorado River between them. The Colorado River Compact was created.
Water developments, such as dams and power plants, along the Colorado River and its tributaries are the product of this arrangement. Water flows are dictated by the Compact as well.